I randomly remembered a manga I read a few years ago and can't find it.
It's about a guy who gets hard all the time and is late to school. The principal sends him, a promiscuous student, and a straight-A student to a separate school type place in the mountains because they were all problem children and the other two are supposed to be in charge of fixing the guy's tardiness. The smart guy works works with the main character to increase his endurance and the playboy character has his own story with his roommate, the younger brother of his former love, a current teacher.
It's really frustrating because I remember it really well, but not any important information like a title, character names, or mangaka name. So annoying. Has anyone read this?